Do you mount the drives using the icons on the desktop? Well, if you do it that way, it gets mounted as read only.

If you do it from the terminal though (or the run command box), you'd be fine. You won't see the desktop icons light up though. If you want to browse it through Konqueror, just open up Konqueror and browse to /mnt/hdx.

Or you can type konqueror /mnt/hdx on the terminal.